Rock-drill.



No. 819,755. PATENTED MAY 8, 1906. H. HELLMAN & L. G. BAYLES.

ROCK DRILL.

APPLIOATION FILED AUG.1o. 19o4.

S i usage such machines receive at t e hands of iran l sfrafrns PATENTorrioii.

i HENRY HELLMANAND LEWIS ooNDIor BYLES, oF JoHANNEsBURG,

l riniNsvAAL.

soon-DRILL. I

No. 819,755." i.

LEWIS CoNDIoT BAYLEs, citizens ofthe United States, residing atJohannesburg, Transvaal,

have invented certain-new and useful Im provements in Rock-Drills orRock-Drilling Machines, of Which the following is a specification. e v LThe present invention relates to rock-drilling machines or engines, andhas for its object to provide an efficient and compact machine ofcomparatively small dimensions and one in which the operative parts arecompletely incased and the machine thereby rendered capable ofwithstandin -the rough the operators.

The improvementshave reference, iirst, to means for introducing themotive Huid into.

'the power-cylinder;l secondly, to means for feeding the machine or fortraversing the power-cylinder longitudinally of its protecting andsupporting casing; thirdly, to means for imparting rotarymotion to thepower-cylinder and drill-bit or cutting-tool;..fourthly, to means forconveying a quantity of the motive fluid to or in roXimity to thecutting extremity of the drill) or bit to remove the rock cuttings frombetween'the cutting edges ofthe bit and the bottom of the hole, whichluid by expansion serves to prevent the overheating of those partsthrough which it passes; ifthly, to .means for forming and directingaround the mouth of the bore-hole a spray or sprays'of Water to meistenor saturate the pulverized rock issuing therefrom to cause it to settleandprevent it passing into the surrounding atmosphere, and, sixthly, tothe f general construction and arrangement ot the machine, ashereinafter more particularly described, and'pointed out in theappended` claims.

. The several improvements constituting our invention will now bedescribed in detail by 'aid of the accompanying sheet of drawins,Wherein.-

j pigure 1 representsl a longitudinal partsectional'elevation of thecomplete machine or engine; Figt 2, a transverse section on line m Fig.1;Fig; `3, a transverse section on line y, y, Fig. 1 ;F1g. 4, atransverse section on line Iz z, Fight.' Fig. `5 is a transverse sectionon line 1... Figf isa transversesec- Specification of Letters Eatent. lApplication iled August 10,1904. Serial No. 220,176.

`the column-bar or other sup ort.

assembling these v Patented may s', 190e.

I verse section on line z z', Fig. 1. Fi ..8 is a longitudinalsection ofa portion of t e-rear end"of Y the machine and its attachments. Fig. 9is a View of cap 12 detached as seen from the inside. Fig. 10is a viewof cap 13 detached as seen from the inside. i

The machine' or engine -consists of3 the 1 power-cylinder 1, which isslidably supported inthe cylindrical casing 2. The cylindrical casing 2is adjustably mounted in and carried by the sleeve 3, which latterV isconstructed With the cone or tapered boss or projection 4, fitted Withthe bolt 5 for fixing it to Instead v of the cone 4 and bolt 5 the seeve 3 may be provided With any other ordinary or suitable means forfixing it in position. is constructed With a central slot 6, whichdivides it into two arts or rings joined by the cone 5. ln the siht 6andencircling the casing 2 is arranged a ring 7. (ShoWn in Figs. 1 and4.) This ring7 is constructed'to -fo'rm a recess 8 onthe inside, inwhich is located a Wedge or tapered key 9. 4In the outside of the twoparts of the sleeve 3 and longitudinally thereof are formed shallowgrooves 1() 11, in which the back or parallel edge of the key 9 restswhen it is in position vinside the recess 8 in the rin 7. .The taperedor inclined edge of the lgiey 9 its the recess 8, which latter istapered to correspond.

arts the ringl 7 is first placed in position in the slot 6 in the sleeve`3 and the recess 8 brou ht into line with the grooves 10 11 and the rey9 then projected The sleeve 3 y along the grooves 10 '11 through therecess 8l `9o The casing 2 is ,now projectedthrough the sleeve 3 and theinside of the ring 7. When the casing 2 hasj`been adjusted or laced inAthe desired positioninfth'e sleeve 3, t e Wedge y or key 9 is thendrivenforward vin the recess 9 5 8 and by drawingfptlie ring 7 securesthe-` casing 2 betweenthe 7 on the oneside f and the interior surfacel othe sleeve 3.at the opposite side.'l The grooves 410 11 in the .sleeve 3prevent the'ring 7 and key 9 moving roo round the sleeve 3, and thecasing 2 1s thereby securely iix'ed inside the sleeve V3.

. By driving the key 9 in the opposite direction the casing 2 isreleased, so that it may be moved longitudinally .of the sleeve ineither direc 1:5 `tion and again secured inthe manner above described. v

The casing '2 1s fitted with ,the caps or covw ers 12 13 'at each end.The cap 12 for the front end of the casing 2, which is-securely iixedthereto by means of screws or otherwise, -is formed 'at the front withan eccentric boss or projection 14: The cap 12, as also the boss 14,vare bored to form a loose iit with the eXteriot1 of the power-cylinder1, so that the latter may slide freely therein in either direc# tion.'Thus the ower-cylinder 1 isarr'anged eccentrically inslde the casing 2,as is clearly illustrated 1n Figs. 1 and 5 of the drawings.

'The cover 13 on the rear end of the protecting-casing 2 is secured inany convenient Inanne'r. This cover 13 is .constructed with an elongatedboss 15, which formsla bearing for a short spindle 16'. On theouterextremity of this splndle 1 6 is keyed or otherwise secured 'wheel 18.

.designedto op crate without a crank 17, which serves for rotating saids indle 16in either direction. On the end of. t e spindle 16 inside thecasing l2 is fixed a toothed wheel 18. Inside the casing ,2 and arrangedlongitudinally thereof are two parallel rods 19 20, the yextremities ofwhich run in bearings 19a 20a',- -formed in the insideof the .caps 1213,' respectively. On the rear ends of the rods 19 2Q are keyed pinions21 22, which .mesh or gear with the toothed When the spindle 16 isrotated' by means of the crank 17, the two rods'19 20 are rotatedthrough the mediumvof the toothed..

wheel 18'andpinions 21 '22.

23 is the cap, fitted on the rear end of the ower-cyl'inder ,11. Thiscap 23 may serve or inclosing thevalve-box'and valve which admits themotive side of the piston,

.ed with an annular. internal roove orrecess 26, and in -that portion oft e.eXtension 24 projectlng through the recess 26 are formed oles 27,.which place said recess 26,Y in comf iially unication with a hole 28'7formed'longitudimunlcates with the interior of the cylinder `1. (SeeFig. 4.) As seen in Fig. 8', the swivel 25 is preferably fitted withcup-leathersor other t eit I I vsuitable. packings piece 25isattachServes :fOr-9 Y ,other motiv sagesl a er side of the annular recess 26to revent leakage ofthe motive fluid from said swivel 25. To theswiveled the eXible pipe 29, whichJ ying the compressed vair or f and 30vdesignates the pasy wivel. aloilgwhich said `iiuid flows fromtheflexible pipe 29 into the recess in th ports for vthat purpose.' Ar-v.,which meshes A allow 'the pinion 39 of saidextension 24, which hole 28com-A 26. f The motive-fluid-sup ly pipe 29 passes through asuitably-curvedEholeBl formed in the cover 13. The hole 31 is curvedinorder to prevent the pipe 29 coming into contact with the crank 17 andwould` also operate to preventthe formation of a kink in the pipe29,Cwhich would tend to throttle'the motiveflui'd supply by restrictingthe `area. f the inlet-passage v into or outof the casing 2 as t epower-cylin-I der 1 iswmoved in either a. forward or rearward direction.

The swivel 2 5 is constructed withtwo lugs or l which h/oles areformedprojections 32 33, in

the two longitudinallyand through which arranged rods 19 20 ro'ect.

and so that the pi e 29 may pass projecting-throu h t e olesvin the'swivel 25,

.act as guides an supports for the rear end of the ower-cylinder 1.

feeding the machine or for advancing or receding the ower-cylinder 1 inthe casing 2 ed rod 19 is formed. in the lug 32 on the swivel-piece25isfitted a nut 34,- formedwith the longitu inal1yarran with ascrew-thread, an

an internal screw-'thread corresponding Atothe thread -on the rod -19,which screws .through it." The nut 34 is keyed, as at 34a in Fig. 4, orfixed any 'other'convenient manner in the swivel 25, so that it isincapa# ble of rotary or longitudinal movement there,

in.- When the rodl or screw `19 is rotated, the nut 34, and with it theswivel 25 and power- For the purpose of I cylinder 1, .are .traversedlongitudinally of t e casing in either direction, corresponding tothedirectlon offrotation ofthe screw 19.

On Vthe extension 24 next the swivel 25 is fixed a toothed wheel 35,which is shrouded or formed with ariiange'36 round the teeth on 'i theone side, 24 next. the toothed wheel.:35 is p laced .a washeror ring 37,twhich 'isvequal to or a proximately equal to the diameter -of-tlliewheel35. On the outer extremit 'of the eX- tension 24 screwed a nut 38,w "ch serves 11i-position thereon the swivel 25 for kee in toothe WfeelM35,'-an'd washer 37.' Onthe other-longitudinally-arranged rod 20 at.the

is l-arrang'ed a pinion 39,

the lug' 33 the toothed wheel 35 and wih rear of is kept in gear vflange36 on the one side. of the teeth 35 and the washer orrmg 37 on the otherside. To

the rod` 20 while preventing it rotating ln'deendently thereof, alongitudinal .groove or eather-way 4.1 is formed in the rod 20, andinthe. pinion 39 is :fixed a feather-key 40, which proj e'cts intosaidfeather-way 41. vThe 'swivel- 'iece 25'isfree to slide on the rod 2O emeans described the feeding of the v En mac e and rotation of thepower-cylinder 1, and with itthedrilling bit or tool 50, varesimultaneousl' are. accomplis ed in the following manner:-

.The' rotatlonof theA crank 17 rotates the therewith by means of thel tomove longitudinally `of.

and on the end of the extension .irc

effected. These operations toothedA wheel 18 and through the medium ofthe pinions 21 22 the two longitudinally-arranged rods 19 20, aspreviously explained.

" The rotation of the screwed rod 19 causes the nut 34` to be traversedlon itudinally of said screw and being xed to t e swivel-piece and thelatter being attached to the `powercylinder 1, the power-cylinder isaccordingly moved forward or backward according to the direction ofrotation of said crank 17, as may be required in the operation of themachine. The rotation ofthe other rod 204 drives the pinion 39, which,meshing with the toothed Wheel 35, rotates the power-cylinder 1 bodilyin its bearings in the swivel-piece 25 and front cap or cover 12 of thecasing 2. As the powercy inder 1 advances or recedes in consonance withthe feed` mechanism the pinion 39-is free to slide longitudinally oftherod 20 on the feather 40 in the feather-way 41, hereinbefore described.1

The means for supplying and directing one or more sprayls of water orother suitable liq` e bore-hole comprisesa swivel'` formed with twobranches 46 47, to which are attached flexible pipes 48 49, the onecommunicating with a source of su ply of compressed or other gaseous uidan the other with a source-of supplyjQf water or other suitable liquidunder pressure. The air-supply may be taken from the main supply-pipe,and it ma be referred to so connect the pipe 48 wit sai main supply-pipeas to admit the air to the swivel 42 simultaneously with its l y In thefront of the swivel 42 four (more or less)small admission to thepower-cylinder 1.

apertures 61 are formed, which communicate with the annular hole 44,through which a'pertures 61 the spray issues. vThese holes 61 may, ifdesired,' be slightly inclined outward Vto cause the spraysto encompassa larger areajo'f the rock-face.

The means we illustrate for rotating he drill o`r bit 50 in unison withthe power-cylinder 1 are substantially those described and illustratedVin a prior application for United States Patent'led by us, Serial N o.210,'519, `1n which the ower-cylinder has xed to it at the front en acap'- 51, formed with a hole 52 Vof square or polygonal section, inwhich-fits `the shank end of the drill or bit 50, formed with a art ofcorresponding shape, which 1n- Sures t e s nchronous rotation of thedrill or bit 50Iwit the power-cylinder 1. We also show-theshank-piece53, which serves for rev. ceiving and-transmitting ltheimpacts ofthe feciprocalpiston to thedrilling-bit orboringtool 50. 54 isthe resilient pad, and 55 a protecting ring or washer located in thefront end of the power-cylinder 1 inside the cap 51 for receiving theimpact of the shank-piece 53 should it be driven forward owing to thedrilling-bit 50 n'ot being in contact with. or in close proximity to thebottom of the hole and at the same time for preventing the escape of themotive fluid round the inner shank of the bit 50. 56 is the port foradmitting the motive fluid to the front end of the power-cylinder, and57 the port which allows the motive fluid to escape round the piston andprevent g it reversing it when the shank-piece 53 is moved forward andthe machine ut out of operation until such time as the s ank-piece 53and piston are pushed back in the c lmder 1 by the feeding forward ofthe mac ne or otherwise. While we illustrate this particular arranement, our present invention is not restrictedz to such a construction,and the several improvements forming the subject-matter of this aplication may be employed or adapted to otlier constructions in which thedrill-bit is preferably rotated by and in unison with thepower-cylinder.

Themeans we provide for conductingfa quantit of themotive fluid from thefrontend of t e power-cylinder 1 to the bottom of the hole being drilledconsists in forming longitudinally through the shank-piece 53 a holey58. The aperture 58 is ofsuitably-small dimensions, so that only asmall'quantity of the motive fluid is able to'pass through it. vThe hole58 in the shankiece 53 is increased in diameter at a short istance fromthe inner roo end. The object we have in view in increasing the diameterof the hole 58 is to utilize the fall in temperature which results,owing able that said piece 53 should be a fairly good" fit in the'boreof the cylinder the means1 de` scribed avoid the possibility of theshank-v piece 53 binding in the cylinder, as it wouldv do were thetemperature ofthe shank-piece' 53w raised sufficiently.

A hole 59 is formed mngitudinauyof the drill-bit or cutting-tool 50. Thehole 5 9 in the shank of the bit 1sA alined with the hole 58h11' theshank-piece 53, so that the motive fluid is free to flow from theshank-piece 53 along the hole 59 and to issue at orin` proximity to thecutting point or ed es of the bit 50'.- By

directing a uantity o the motive fluid in this manner Vetween thecutting edges of the tool and the bottom of the hole the rock cut--tings are blown away from the cutting-face of the tool, and by therepeated reciproca- V tions of the tool 50, combined with the action ofthe motivel fluidissuing at the cutting- IlO point, the pulverized rockissues from the mouth of the bore-hole, where it is met by the spraysand the solid particles thereby satur-v atedv and caused to settle.downwardly-inclined and wet holes the water and particles of rock arekept constantly agitated and the cuttings are thereby prevented romsettling or accumulating in the bottom of the hole. by removing the cutts from between the cutting ed es of the dril -bit and thev bottom of theho e immediately they are formed the eiiciency of the bit is therebymaterially increased.. The motive fluid, ilowing along `the drilling bitor tool- 50, also tends to prevent the undue heating of the same. It is,

well known that in the operation of rockdrilling machines or engines thecutting end o'r' the drill or tool ordinarily becomes Vvvery zovrnuchheated,- more especially in the drilling of'upwardly-inclined and dryholes, so much so thatthe durability of the` bit is thereby materiallyimaired l, v c What we -c aim as oui` invention, and' desire to protect. bLetters Patent, is-

1. In a rockmachine or engine, 1n

' combination, a casing,` a power-cylinder therein,v al cap iiXed at therear end of1 the Tower-cylinder, 'formed with a rearward eX- tension, aswivel and adapted to admit' the motive iiuidthrough said extensiontothe `power-c vlinder, a pipe for conducting-the-motive lui t'o saidswivel, pacldngs arrangedat either side of said swivel to prevent frombetween the'swivel andthe extension upon which'it is arranged, .and 4screw connectlons leading from the-outside of the cap and passingthiough the swivel,A for moving the power-cylinder. v

2. In a rock-drilling machine or engine, .in

combination, fa' casing, a power cylinder therein, a-capratfthe-rearfend of the powercylinder, formed with a rearward extension,

a swivel arrangedy on saidnextensionformed withan internal annularrecess, ports formedin saidextenslonfand placing said'extension 1Dcommunication with the. power-cylinder and-packings itted'in the swivelto prevent fthe escape'of the motive fluid Jr'rom between the swivel andextension, and means for conducting-the motive fluid into said swivel,and

y screwv connections Iea'dingfrom the outside of the capand-passing-through the swivel, for moving the power-cylinder.

`3. In a rock-drillingmachine or engine, in combination, apower-cylinder, Va c 'lindrical casingcomlpletely surrounding saicylinder dab , and sli and rotatably sup orting. the same,iadri1 -orbitcarried'at the orward end ofsaid cylinder, afe'ed-screw arrangedlongitudmally'ofalrd inside the protecting casing,

'a swivel looselyy embracin a part carried by avmg ab working In thecase of".

It will be obvious that arranged on\'saidl extension the escape ofthemotive fluid yfor rotating the screw'to move they power#l cylinder inthe protecting-casing.

4. In a rockdrilling machinel or'engine, in' combination, apower-cylinder,, a c lindrical' .casing completely surrounding saicylinder and slidably and4 rotatably supporting the1 same, a= drill bitor toclcarried by the forward extremity of said' cylinder, a: swivel'-piece having passages'foileading the-motive fluid to the power-cylinderand. loosely embracinga part carried'- thereby' and having' axworkingconnection with a feed-screw, and means for rotating'v the screwto" movethe power-cylinder in the protecting-casing.

5. yIn a rock-drilling machinecr engine, in combination', a power-clinder, 'al protectingcasing in which said cy inden isslidably androtatably mounted, a= drillbit or tool carriedbythe forward: extremityof'said cylinder, a swivel-piece having passages for leading' the motivefluid to the powercylinder and loosely connected therewith and' having"a working connection' with= afeedi-screw, v alpin# ion arranged on therear end of said screw, a spindle carried by the protectingecasing', atoothedwheel;iXed-thereon and? gearingwith the ieedL screw, to move thepower-cylinder in its protecting-casing.

6.- In a rock-drilling machine on engine,..incombination, aprotectin"-casing, af powercylinder slidably mounts therein, a ca fit:-ted at therear end thereofl formed@ with a rearward4 extension, a swiveladapted to-in troduce the motive iiuid-intol'the'powereoyl'- inderthroughsaid extension, a feedmut canried by said swivel, a feed-screwarranged lon itudinall'y of thecasing working through sai nut-1,a:toothed'wheeharrangedon the'ex* tension of the cylinder-ca a-rodorspindle arranged longitudinally o thecasing, a-pin- ICO ion mounted'thereon and slidable longitudinally thereoi1 gearing thetoothed: wheelon the extension and means forrotatinig the feedscrew to feed the drilland forrot'atingthe rod or spindle torotate the-po-weucylinder,

substantially as descbea- 7. I'n a rock-'drilling machine or'engin'c',in' combination, a 'power-cylinder", a cap-fitted- Jward extension, aswivel mountedthereen for.

introducingy the motive fluid toi the` pow/ercylinder, means forintroduoingthe-motive at the rear end thereofi formed' with a rear`-fluid to said swivel, a toothedwheelbnthe' I extension, a feed-nutcarried'by the swivel, ai feed-screw supported longitudinallyoff thepower-cylinder workin through sand-nut', a-

Irod or spindle arrangeI longitudinally ofthe` power-cylinder rojected tough:A ra. holeyin the swivel, whic rod oryspindle-in conjunctionwiththe fee/screw serves to support IZO and'guide 'the lrear ofthepow-efec linder; A a pinion on the extension.andl means* or com' pellinl saidpim'on'to rotate'withfsaid rod'or spmd e while permitting it' toslide -lcngituii-` nally thereof and' for compelling it t'oremain-` ingear with the' toothed wheel on theextension, and means for rotatingthefeed-screw and rod' or s indle to advance or recede the power-cylin erand for rotating the same, substantially as described.

8. In a rock-drilling machine or engine, in combination, aower-cylinder, a protectin casing in whic said cylinder 1s slidabIymounted, a cap fitted at the rear end thereof formed with a rearwardextension, a swivel arranged on said extension, ports placing saidYswivc in communication with the power-cylinder, a toothed wheel ontheextension, a feednut carried bythe swivel, a feed-screw journaled inthe ends of the casing worln'ng throu h said nut, la pinion Xed' on therear end O, said screw, a rod or spindle nj ournaled in the ends ofthecasing, a mion ngthe rod or spindle gearing the toot ed wheel on thecylinder-cap extension, means for compelsaid pinion to movelongitudinally of thefro or s indle tb maintain it in gear with the tooted wheel,` means for compelling said pinion to rotate with the rodorspindle while permittingit to slide longitudinally thereof,agspindlejournaled inthe rear end of the casing, a toothed lwheel fittedon the inner end thereof engaging the pinions on the rear end of thefeed-screw and rod or` spindle and means for rotating said toothed wheelto rotate the feed-screw and rod ons indle to advance or recede thepower-cylin er and to rotate the same, substantially as described. f

` 9. I narock-drilling machine orengine, in

combinationfa protectin -casing, a power-` .cylinder slidablymountetherein," a cap itted at the 'rear end of the-poWer-cyhnder formedwith a rearward extension, uports formedin said extension communicatingwith the interior bf the power-cylinder, a swivel arranged `o`n saidextension communicating through said portswith thewinterior of thelpower-c linder,= a pipe for conducting the motive uidto said swivel, anaperture formed in the end of the protect' casing or cover through whichthe motiveuid-supply pipe projects, a feed-nut carried by the swivelfraeed-screw journale'd in the ends of the protecting-casing workingthrough said feednut, a pinion fixed on the rear endJ ofsaid feed-screw,a rod` journaled in thejends' of the; protectin -casing passin .througha vhole in the swivel, a pinion fixeon the rear end of' said rod, apinion arr' ed on said rod and movable longitudinally thereoin a'feather- Way formed therein, a toothed-wheel fixed on the cylinder-capextension caring the pinion;

movable longitudinally of t e rod and means foilcompellin the inion toVremain in gear 6o:with'-the' toot ed wheel on the extensiomaIn spindlejournaled in the ends ofthe rotecting-casing, a toothed wheel fixedfon teinner -end thereof, pinions gearing the inner ends of the'screw and rodand a .crank for rotatin y said spindle to rotate the screw and ro incombination, a

and securing' said protectin -casing through `the toothed wheel andpinions to feed and rotate the power-cylinder, substantially asdescribed.

V10. In a rock-drilling machine or engine,

ower-cylinder, a protecting-casing in whic said c linder is slidablymounted, a cap fitted at t e forward end of saidprotecting-casing formedwith an eccentric bore throughwhich the power-cylinder works, a capfitted at the rear end of said casing, a screw journaled longitudinallyof the casing and a parallel rod journaled in the ends of the casing,means for simultaneously rotating said screw and rod, a swivel carriedon the rear end of the power-cylinder, said swivel carrying a nutthrough which the screwed rod works and through a hole in which swivelthe rod projects to supportand guide the power-cylinder, means forintroducing the motive fluid into said swivel, and gear-wheels on therear end of the cylinder andflongitudinal rod for rotating the cylinder,substantially as'described. l 11.In a rock-drilling machine or engine,in combination, aprotecting-casin a power- 9o. cylinder slidably mountedin sai casing, aswivelfor conductin the motive iiuid to said cylindersaid swive carrying a'feed-nut, a feed-screw journaled in the ends ofthe casing working through said feednut for' traversing the cylinder.lon itudinall of j the casing, a rod journaled in t e ends o the casingformed with a lon itudinal feather-way, apinon fitted with a eather-keytraversing said featheri way to compel the pinion to rotate with the roorod while permittin it to de longitudinally, a toothed whee secured atthe rear end of the power-cylinder constructed with a shroud or iiangeat one side and fitted Witha rin or washer at the other side of theteeth for eeping the pinion on therod inear with said toothed Wheel andfor compe the A. pinion to move longitudinally of the rod as thecylinder is advanced or receded in the `protecting-casing, substantiallyas described. r 1o 12. In a nook-drilling machine or engine, in'combinat1on, a power-cylinder, a protect- -casing nclosing thesameinwhichsaid cyler is slidably mounted ,means for mounting on a col- I 15 umn-bar or other support a justab e longitudinally 'of saidprotecting-casing, means located at the rearendof the oWer-cylinde`rforadmitting `the motive fluid) to either end of said cylinder, a feednutcarried byJ/ usaid 12o means, afeed-screw journaled longitu ally of the`casing workingythrough'said nut for advancingand receding the power-clinder, a gear-wheel, carried bythe rear en of the power cylinder, a flongitudinally arranged I 2 5 i' rod jou'rnaled in theprotecting-casing, a 1n- A.

ion mounted. thereon in gear with the w .eel -at the rear of thepower-cylinder, said plmon' l being movable longitudinally of Vsaid rod,and

means for compellingsaid pinion to slidelon- .1go l ing-casing in whicgitudinally of th'e rod to maintain it in gear with the toothed wheelwhen the cylinder -is moved in either direction in its protectingcasing,and means for rotating the feed-screw c and rod, Substantially asdescribed. l 13. In a rock-,drilling machine or engine,

ower-cylinder, a protectin combination, a

said cylinder is slidably mounted, a cap iitted at thel front end ofsaid casing, a 4swivel mounted on said cap, apertures formed in saidswivel forfdirecting, a spray or sprays around the mouth ofthebore-hole, and means for conducting water and`A air 'to` said swivel toform the spray-or sprays, substantially as described. 14. In arock-drilling machine or engine,

1 'in combination, a power-cylinder, a protecting-casing in which saidcylinder is slidablymounted, a cap fitted at the i'ront end of saidcasing formed with an extension, a swivel mounted on`said extensionformed with an annular hole, a piece formed with two branches attachedto'said swivel and communicating with the annular hole, a pipe -confnected to one branch for conducting compressed air or other gaseousfluid to the swivel and a pipeconnectedwith' the other branch Ass 'cutting en of the drill or tool toremovethefor conducting water'o'rliquid under pressurev to the'swivel, and a plurality of aperturesformed in the Jr'ront of the swivel for directing a spray or s raysround the mouth ofthe bore-hole, su stantially as described. i

15. In a rock-drilling machine or engine,

in combination, a power-cylinder, a shank-- piece fitted in the forwardvend thereof which receives and transmits the impacts of thereciprocating ercussive member to the drilling bit or too -*formed witha longitudinal hole for permitting a quantityfof the motive fluid toower-cylinder through said pass from the n shank-piece, a 'll bit ortoolcarried by the forward endY of said power-cylinder and constructed'to rotate in unison therewith and formed with a longitudinal hole whichcoin.

cideswith the 'hole in the shank-piece for conductinga uantity of themotive uidto the rock-cuttings and for keeping the shank! i'eceing-casing in'whic described. p v

16` In a rock-drilling machine orengine, in combination, aoWer-cylinder, a protectsaid cylinder is slidably mounted, a ca fittedon the orward end of said power-cyinder formed with ,an extension, aswivel mounted on said extension con-v structed with an ,annular hole, apiece ttedL to i, said extension-swivel ,for-med with two,-` v branches,a pipe attached to lone branch for conducting compressed' air or othervaseous iuid t o said swivel anda pipe attache `vto* the other branchlfor conducting v'vat'er 'under pressure to said swivel, apertures formedin .th Viront of the swivel for directing round the'mouth ofthe'bore-hole, a

andldrilling bit or toolv cool, substantial y as' der which receives andtransmits the impacts of the reciprocating percussive member to ofsquare or polygonal section, a drill-bit formed with a portion of itsshankror corre- (siponding section fitting said cap s'o-that the ill orbit is com elled to rotate in unison with the power-cylinder and with alongitu- .dinal hole for conducting the Huid passing hole to'blow outthe rock-cuttings, substantiall5r as described.

17. In a rock-drilling machine or engine, in combination, apower-cylinder, a protectl mounted, a shank-piece iitted in the forwardend of said cylinder formed with a hole longitudinally thereof for'permitting aquantity of the motive fluid to pass throughit from theower-cylinder, a drill or bit carriedj by the orward end of saidcylinder engaging'the front end vof the shank-piece, means forcompelling said bit to rotate iriunison with the power-cylinder, saidbit being formed with a in progrimty to the bottomfof the hole forremoving the rock-cuttings a swivel mountv 1 ed on the cap or frontengiof' the protecting-'- pipes'communicatingwith said swivel y lcasing,

`for con ucticompressed air or? cthermoswivel, aperturesf'ormed in theswivel for directing sprays round' the mouth of the bereescape from thebore-hol'e',means adjustable mountiig: andsecuringthe same, and meanslfor' sim taneouslyjeeding and` rotating the power-cylindelinretecting-casin'g7 substantiallyas describ 18,. In a rock-drillingmachine orrengine', incombination, a power-cylinder, a protect--ing-casing inclosingisai'di cylinder, a capfitted on the front ci" saicylinder formed with ancylinder slides, a swivel'meuntedon said ectosaid swivel, apertures formed inthe swivcl' 'tive Huid an Water or otherliquid! to said' longitudinally ofv the prlc'itectifng*-casingv for' fordirecting spraysvv around the meutht off-the carried'- bytheswivel, aeed-serewworkiig piece fitted in the forward endof said cylinthedrin-bit, said Shank-piece beingtimedV 5 with a longitudinal hole,- acap fitted at the end of the power-cylinder formed with a hole throughthe shank-piece to' .the bottom of the ing'casing in which said cylinderi's slidably l longitudinal hole for conducting the motive fluid passingthrough the shank-piece to or hole to saturate the' particles ofl rockasthey eccentric bess andboreainl which the powercentri'cboss, pipescornmunieating with said swivell for conducting motive i'uidv and waterthe rear end of the power-cylinder, substan-- tially as described.

19. .In a rock-drilling machine or engine, L in combination, aprotecting-casing, a powercylinder slidably mounted therein, a capfitted at the rear, end thereof .and formed with `a rearward extension,a feed-screw arran ed longitudinally of said cylinder, a toot ed 2 wheelarranged on the extension of the cyltudinally of the casing, a pinionmounted thereon and slidably lon 'tudinally thereof in mesh with atoothed W eel on the eXten- 2 5 sion, and means for rotating nthefeed-screw to feed the drill, and for rotatin the rod or spindle torotate the power-cy der, substantially as described. 20. In arock-drilling machine or engine, 515 in combination, a. casing, apower-cylinder therein, a cap fitted at the rear end of thepower-cylinder, formed with a rearward extension, a swivel mountedthereon for intro- 'ducing motive fluid to said cylinder, a ginde- 55rod for the swivel, a feed-screw supported longitudinally of thepower-cylinder, and connections whereby the feed-screw will drive theswivel, said connections including a piniomon the'aforesaid rear endofthe cap, 40 and means for compelling said inion tofrotate whilepermitting it to sli e upon the guide-rod a oresaid, and forcompelllngfit to -remain in gear with the toothed wheel on theextension,'and means for rotating the feedscrew. and the guide-rod toadvance or recede the power-c linder-and fos` rotating the same,s'ubstantia y as described.

.21. In a rock-'drilling -machine or engine, in combination, a:ower-cylinder, a protecting-casing in whic said cylinder is slidablmounted, a cap fitted at the rear end thereo and formed witlaa rearwardextension, a

swivel` arranged-jonfsaid extension, ports4 lacing-said swivel inconnection'with 'the S5 power-cylinder, atoothed wheel on the extension,afeed-screw journaled in the ends of the c and connecting with theswivel to drive t e same, a pinion fixed on the rear .p Vend of Saidscrew, a rod or spindle journaled 6 in the endsof the casing', a'pmionon the rod' or spindle. in mesh with the toothed wheelon thecylinder-cap extension, means for compeiling said pimon to movelongitudinally'of thel rod or spindle to maintain it 1n ear with thgl,toothed wheel, means for compe said `power-cylinder, a pipe forconducting' motive luder-cap, a rod or spindle arranged longipinion torotate with the `rod or s indle while permitting itto slide longitudinay thereof, a spindle journaled in the rear end ofthe casing, a toothedwheel fitted on the inner end thereof engaging the pinion on the rearend of the feed-screw, a rod or spindle and means for rotating saidtoothed wheel to rotate the feed-screw and a rod or spindle toadvance orrecede the power-cylinder and to rotate the same,` substantially asdescribed;

22. In a rock-drilling machine or engine,' in combination, aprotecting-casing, a powercylinder slidably mounted therein, a capfitted at the rear end of the ower-cylinder and formed with a rearwarextension, ports 8o formed in said extension connecting withinterior ofthe power-cylinder, a swivel arranged on said .extension and connectingthrough said parts with the interior of the uid to said swivel, afeed-screw journaled in' the ends ofthe protecting-casing and con-,nesting with the swivel to drive the same, a

pinion fixed on the rear end of said feedscrew, a rod journaled in theends of the protecting-casing, and with which the swivel has a slidingengagement, a pinion fixed on the rear end of said rod, a pinionarranged onv said rod and movable longitudinally and nonrotatablythereof, a toothed wheel fixed on the cylinder-cap extension andconnected with the pinion and movable longitudinally of the rod, andmeans for compelling the inion to remain in gear with the toothed w eelon the extension, a spindle journaled in the ends of theprotecting-casing, a toothed wheel fixed on the inner end thereof,pinions gearing the inner ends of the screw and rod, and a crank forrotating said spindle to rotate the screw and rod through the toothedlwheel and inions to feed and rotate the power-cylinder, substantiallyas described.

23. In a rock-drilling machine or engine, combination, a ower-cylinder,a protecting-casing, in whic said c linder is slidably mounted, a capfitted at t e forward end of said protecting-casing andprovided with aneccentric bore throu h which the power-cylinder works, a cap tted at therear endof said casing, a screw 'ournaled longitudinally of the casing,a para l rod journaled/in the ends of the casing, vmeans forsimultaneously IIO ' rotating said screw and rod, a swivel carried onthe rear Aend of said power-cylinder, connections whereby the feed-screwdrives the swivel, connectlons whereby said swivel slidably en ages .therod to support the power-c lin er, means for introducing motive luiintosaid swivel, and gear-Wheelson the rear end of the cylinder and alon 'tudinal rd for rotating thecylinder,` su stantially as described. i

24. In a rock-drilling machine or engine, in combination, avprotecting-Casin a powercylinder slidably mounted in sai casing, a 13oIOO swivel lfor conducting the motive fluid to said cylinder, afeed-screw journaled in the ends of the casing and connections wherebythe feed-screw drives the swivel for traversingthe cylinderlongitudinally of the casing,

a rod journaledv in the ends of the casing, aV pinion slidably andnon-rotatably mountedin combination, a power-cylinder, aprotecting-casing inclosing the same and in which Y said cylinder is4slidably mounted, means for mounting and securing saidprotecting-casing on a' columnfbaror other support adjustab e lonitudinallyrof said protecting-casing, means. or admitting the motivefluid to either end ofvsaid e linder, a feedscrewjournaled longitudinaly within the casing, and

connections, engaging the means for admit-Y ting the motive fluid,whereby the feedscrew is utilized for advancing and receding A.

nally-arranged rod journaled within the pro;

tectmg-casing, a pinion mounted thereon in gear with the wheel at therear of the'powercylinder, said pinion b'eingmovable lon' itu dinally ofsaid ro'd, and means-for com' e lin' said pinion to slide longitudinallyof gli to maintain it in gear with the toothed'wli'eel when the cylinderis moved in either dii'eei tion in this protecting-casing, and means forrotating the feed-screw and rod, substan tially as desc `bed.

our hands in the presence of two' subscribing Witnesses.

lHENRY HELLMN. s l NLEWIS' CONDICT BAYLES.-

Witnesses: l

CHAs. OvENDALE, R.'()v1n\IDAL1'-1.4

In witness whereof -we have 'hereunto setv

